Bugfixes, cache cleanup, and Referer forwarding

.github/workflows/deploy.yml

@@ -0,0 +1,34 @@
+name: Deploy to FTP
+concurrency: 
+  group: ${{ github.workflow }}
+  cancel-in-progress: true
+run-name: ${{ github.actor }} triggered deployment to FTP
+
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Upload to FTP
+        uses: SamKirkland/FTP-Deploy-Action@v4.3.5
+        with:
+          server: ${{ secrets.FTP_SERVER }}
+          username: ${{ secrets.FTP_USERNAME }}
+          password: ${{ secrets.FTP_PASSWORD }}
+          protocol: ftps
+          local-dir: ./
+          server-dir: ./
+          dangerous-clean-slate: true
+          exclude: |
+            **/.git*
+            **/.git*/**
+            **/example/**
+            **/README.md
+            **/LICENSE
+            **/composer.json

public/.gitignore

@@ -1,3 +1,4 @@
 *
 !.gitignore
-
+!.htaccess
+!index.php

public/.htaccess

@@ -0,0 +1,13 @@
+RewriteEngine on
+
+# Block requests without valid referer (allow empty referer for direct API calls)
+RewriteCond %{HTTP_REFERER} !^$
+RewriteCond %{HTTP_REFERER} !^https?://(.*\.)?lammers-krueger\.de [NC]
+RewriteCond %{HTTP_REFERER} !^https?://localhost [NC]
+RewriteCond %{HTTP_REFERER} !^https?://127\.0\.0\.1 [NC]
+RewriteRule .* - [F,L]
+
+# Route all requests to index.php
+RewriteCond %{REQUEST_FILENAME} !-d
+RewriteCond %{REQUEST_FILENAME} !-f
+RewriteRule . /index.php [L]

public/index.php

@@ -0,0 +1,17 @@
+<?php
+
+require_once(__DIR__ . '/../src/TileProxy.php');
+require_once(__DIR__ . '/../src/MapStyle.php');
+
+$style_osm = new \com\augmentedlogic\osmtileproxy\MapStyle("osm");
+$style_osm->setMirrors(array("http://a.tile.openstreetmap.org", "http://b.tile.openstreetmap.org", "http://c.tile.openstreetmap.org"));
+
+//$style_osm->setEffectModulate(100, 50, 100);
+//$style_osm->setEffectSepia(90);
+//$style_osm->setEffectNegate();
+
+$tileproxy = new \com\augmentedlogic\osmtileproxy\TileProxy();
+$tileproxy->addStyle($style_osm);
+$tileproxy->setRefresh(5);
+$tileproxy->setLogLevel(\com\augmentedlogic\osmtileproxy\TileProxy::LOGLEVEL_OFF);
+$tileproxy->handle();

scripts/cleanup-cache.sh

@@ -0,0 +1,28 @@
+#!/bin/bash
+# OSM Tile Cache Cleanup Script
+# Usage: ./cleanup-cache.sh [CACHE_DIR]
+# Cron: 0 3 */5 * * /path/to/cleanup-cache.sh /path/to/cache
+
+CACHE_DIR="${1:?Usage: $0 CACHE_DIR}"
+MAX_AGE_DAYS=13
+MAX_SIZE_BYTES=1073741824  # 1GB per style folder
+
+# Delete files older than MAX_AGE_DAYS
+find "$CACHE_DIR" -type f -mtime +$MAX_AGE_DAYS -delete
+
+# Shrink folders over 1GB by deleting oldest files
+for dir in "$CACHE_DIR"/*/; do
+    [ -d "$dir" ] || continue
+    while true; do
+        size=$(du -sb "$dir" 2>/dev/null | cut -f1)
+        [ -z "$size" ] && break
+        [ "$size" -le $MAX_SIZE_BYTES ] && break
+
+        oldest=$(find "$dir" -type f -printf '%T+ %p\n' 2>/dev/null | sort | head -1 | cut -d' ' -f2-)
+        [ -z "$oldest" ] && break
+        rm -f "$oldest"
+    done
+done
+
+# Remove empty directories
+find "$CACHE_DIR" -type d -empty -delete

src/TileProxy.php

@@ -37,13 +37,14 @@ class TileProxy
 
     private $user_agent = "Mozilla/5.0 (X11; Linux i586; rv:31.0) Gecko/20100101 Firefox/74.0";
 
-    private $option_storage_dir = "../cache/";
-    private $option_log_dir = "../log/";
+    private $option_storage_dir = "../cache";
+    private $option_log_dir = "../log";
     private $option_loglevel = 0;
     private $option_ttl = 86400; // default browser expiry time
     private $option_refresh = null; // refresh after n days, null = ignored
 
     private $allow_referrer = null;
+    private $outgoing_referrer = null;
     /**
      * @var MapStyle[]
      */
@@ -91,6 +92,11 @@ public function setReferrer(?string $referrer = null): void
         $this->allow_referrer = $referrer;
     }
 
+    public function setOutgoingReferrer(?string $referrer = null): void
+    {
+        $this->outgoing_referrer = $referrer;
+    }
+
     public function setLogLevel(int $loglevel): void
     {
         $this->option_loglevel = $loglevel;
@@ -140,14 +146,26 @@ private function fetchTile(MapStyle $current_style, string $filepath, string $ta
         curl_setopt($ch, CURLOPT_FILE, $fp);
         curl_setopt($ch, CURLOPT_HEADER, 0);
         curl_setopt($ch, CURLOPT_USERAGENT, $this->user_agent);
+        curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
+        $referer = !empty($_SERVER['HTTP_REFERER']) ? $_SERVER['HTTP_REFERER'] : $this->outgoing_referrer;
+        if (!empty($referer)) {
+            curl_setopt($ch, CURLOPT_REFERER, $referer);
+        }
         curl_exec($ch);
+        $curlError = curl_errno($ch);
+        $curlErrorMsg = curl_error($ch);
+        $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
         curl_close($ch);
         fflush($fp);
         fclose($fp);
 
         // check if image downloaded successfully
-        if (curl_errno($ch) !== 0) {
-            throw new RuntimeException(curl_error($ch));
+        if ($curlError !== 0) {
+            throw new RuntimeException($curlErrorMsg);
+        } elseif ($httpCode !== 200) {
+            $content = @file_get_contents($save_to);
+            @unlink($save_to);
+            throw new RuntimeException("HTTP $httpCode: $content");
         } elseif ($this->is_valid_image($save_to, $current_style)) {
 
             if($current_style->getImageChecktype() !== MapStyle::IMAGE_FORMAT_PNG) {